<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <div id="app">
        <!-- lazy -->
        <!-- <input v-model.lazy="val" type="text">
        <h3>
            {{ val }}
        </h3> -->

        <!-- number  转换为数字类型 -->
        <!-- 
        <input v-model.number="val" type="text">
        <button @click="fn">点我</button> -->

        <!-- .trim -->
        <input v-model.trim="val" type="text">
        <button @click="fn">点我</button>
    </div>

    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>

        new Vue({
            // 元素
            el: "#app",
            // 定义的数据(状态)
            data: {
                val: ''
            },
            methods: {
                fn() {
                    console.log(this.val)
                }
            }
        })
    </script>
</body>

</html>